Deckle-strap.



J. s. PATTERSON.

DEGKLE STRAP.

LPPLIOATIOH FILED JAN. 10, 1910.

Patented Apr. 18*, 1911.

INVENTOR f Wwzmu By -Azt0meys;

'rmlom WITNESSES:

UNITED STATES PATENT OFFICE.

JOHN S. PATTERSON, OF CHELSEA, DIASSACHUSETTS, ASSIGNOR T0 REVERE RUBBERCOMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

DECKLE-QTRAP.

Application filed January 10, 1910.

Specification of Letters Patent.

lflliOl'lliOd Apr. 18, 19] 1.

Serial No. 537,207.

.Z'o all 'Ul/mifb it may concern..-

lic it known that l, JOHN S. lx'uriiuson'. u citizen of the linitcdHiatus, i'i'siiliug at lu lscz-i. in the county of Hnlt'ol uiul bituteo! AKlJKS KH'llltHttlH, have invented certain new and usL-lulIuiprovcnicuts in l)e -l lc-tt'raps, of which the following is aspecification.

This invention relates to (lt.-(..l l(, straps forming the sides of thewire apron or trough of a p: per n'ialiing machine. .Uerrlclo straps arecommonly made of an endless band of flexible rubber, square in ci-oss-setion and huviiig :1 central strengthening core built up of l: wrs oftextile fabric. The tl((l(lt strap is so applied that the layers offabric coi'istit'uting the core lie parallel to the axes of the carryingwheels or pulleys, so that they readily flex in passing aroui'id thesepulleys. Consequently a strap so constructed has two wearing surfaces sothat the strap when worn on one side may be turned completely over andused until the opposite side is worn, but by reason of the lateralstiffness of the core which precludes the proper flexing of the straparound the pulleys when turned on either side, it results that the othertwo of the four sides are unavailable for wear.

It has long been the desire of users of dcckle straps to be able to useall four sides of the strap, thereby doubling its utility and savingmuch inconvenience by reason of the less frequent necessity of sendingthe straps to be reground. To attain this result it is necessary to makethe core equally flexible in all four directions, so that the strap maybe able to flex around the pulleys with equal readiness whichever sideup it may be turned. Efforts in this direction have been made with somesuccess, but the deckle straps pro- (luced have not been in all respectssatisfactory.

My present invention provides an improved construction of deckle strapwhich characterized in the provision of a square core as distinguishedfrom either a cylindrical core or a symmetrical plurality of cores. Asquare core has the advantage of maintaining an equal thickness of theflexible rubber on all sides instead of the flexible rubber beingthinner at the middle of the sides and thicker toward the corners. Thesquare core provided by my invention is equally flexible when benteither upward or downward or to right or left. To this end the core isconstructed of four quarter sections, each of which is built up oflayers of textile fabric alternated with rubber, and in assembling thefour quarter sections the layers in two O]')]')0Sll'0 sections arearranged vertically, and in the other two sections are ui'ral'lgcdhorizontally, so that the layers in each quarter are in planesperpeiidicular to those of the two next adjoining quarters. The textilefabric is preferably duck, and to give the maximum lateral flexibility,the duck is cut on the bias.

Figure l of the acconipunying drawings shows a fragn'ient of the decklestrap passing over one of the supporting rollers or pulleys; Fig. 2 is atransverse section of the dcckle strap; Fig. 3 is a perspective Viewshowing one of the quarter sections of the core built up; Fig. 4- is aperspective showing the entire core assembled.

In Fig. 1 A shows the deckle Strap and B one of the pulleys or wheelscarrying it. The deckle strap consists of a fabric core C and a softrubber envelop D, both being square in crosssection, as shown in Fig. 2,and the core located centrally so that the rubber envelop is of uniformthickness all around the core.

The core is built up of four quarter sections E E, as best shown in Fig.4:, one of these quarters being shown in Fig. 2. Each quarter section isbuilt up of layers of duck a, preferably alternated with layers ofrubher 6. The duck may be frictioned or treated with rubber in any waycommonly practiced, or merely alternated with sheets of rubber, all ofwhich in the subsequent vulcanizing are united integrally. The strips ofduck a are preferably cut bias in order to give the maximum lateralflexibility; or this flexibility may be imparted by the use of tapes orstrips woven, braided or otherwise united in any suitable manner tosecure the requisite strength, together with a suitable degree offlexibility. The four quarter sections having thus been built up arethen united in the manner shown in Fig. 4, that is to say, with thelayers of each quarter turned perpendicularly to those of the nextadjoining quarter. The quarter sections E E are shown as turned withtheir layers horizontal, while E E have their layers vertical. Thequarter sections are thus cemented together to form the complete core,and. this core is inclosed in the soft rubber envelop D, and the Wholeis vulcanized in the usual manner. The decklc strap thus produced hasequal flexibility When run With any one of its four faces against theWire. The core affords all need ful flexibility in each direction. Thecore is confined to the center of the strap, and is surrounded on allsides With an equal thick ness of the soft rubber. The result of theseconditions is that my improved deckle strap more perfectly answers tothe desired conditilons than any construction heretofore ap- 3 ied.

l The declrle strap of my present invention is distinguished from thatset forth in my Patent No. 826,739, granted July 24, 1906, in that thecore is square and built up of layers of fibrous material, Whereas in mysaid patent, instead of a single core a plurality of cores or cords oftextile material are provided, these cords being separated from eachother symmetrically. The construction embodied in my said patent wasdesigned like my present invent-ion to render the deckle strap equallyflexible in either direction, but in aiming at this result my formerinvention provided an entirely different construction from that nowdisclosed.

I claim as my invention 1. A deckle strap consisting of a band offlexible rubber, square in cross section, having a square core ofsuperposed strips of fibrous material disposed in planes parallel to therespective sides of the band, and of equal flexibility When bent in theplanes of either of the sides of the band.

2. A declrle strap consisting of a band of flexible rubber, square incross-section, having a square core of layers of textile fabric cut biasto afford lateral flexibility, and said layers arranged in planesparallel to the respective sides of the band to give equal flexibilityWhen bent in the planes of either of the sides of the band.

3. A declrle strap consisting of a band of flexible rubber, square incross-section, hav ing a square core built up of four quartersectionseach formed of layers of fibrous ma terial, the layers in each quarterbeing in planes perpendicular to those of the two next adjoiningquarters.

4. A. deekle strap consisting of a band of flexible rubber, square incross-section, having a square core built up of four quarter sectionseach formed of layers of textile fabric cut bias, the layers in eachquarter being in planes perpendicular to those of the two next adjoiningquarters.

In Witness whereof, Ihave hereunto signed my name in the presence of tWosubscribing Witnesses.

JOHN S. PATTERSON.

itnesses WVALTER F. J ONES, WVILLIAM H. TUCKER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

